Display substrate and display device

ABSTRACT

A display substrate, a method for driving the same, a display device, and a fine metal mask are provided, and a display area of the display substrate includes a first display sub-area in which pixels are distributed at a high density, and a second display sub-area in which pixels are distributed at a low density.

This application is a continuation application of U.S. patentapplication Ser. No. 17/731,672 filed with USPTO on Apr. 28, 2022. TheU.S. patent application Ser. No. 17/731,672 is a continuationapplication of U.S. patent application Ser. No. 16/615,996 filed withUSPTO on Nov. 22, 2019. The U.S. patent application Ser. No. 16/615,996is a continuation of International Application No. PCT/CN2019/078871,filed on Mar. 20, 2019. The International Application claims thebenefits of Chinese Patent Application No. 201810639832.6, filed withthe China National Intellectual Property Administration on Jun. 20,2018. The afore-mentioned patent applications are hereby incorporated byreference in their entireties.

FIELD

This disclosure relates to the field of display technologies, andparticularly to a display substrate and display device.

BACKGROUND

As the display technologies are developing, an all-screen panel with ahigh screen to panel ratio and an ultra-narrow bezel can greatly improvea visual effect over a general display panel, and thus has been widelyfavored. At present, a front camera, an earphone, a fingerprintrecognition area, a physical button, etc., are typically arranged on thefront face of a display device including an all-screen panel, e.g., amobile phone, to photograph its user, to conduct a video session, torecognize a fingerprint, and to perform other functions. However thearrangement of these indispensable functional elements may hinder ascreen to panel ratio from being improved.

SUMMARY

In first aspect, embodiments of this disclosure provide a displaysubstrate including a display area including a first display sub-areaand a second display sub-area;

a distribution density of pixels in the first display sub-area isgreater than a distribution density of pixels in the second displaysub-area;

the second display sub-area includes a plurality of third pixelelements, wherein each of the plurality of third pixel elements includesmultiple sub-pixels, and a distance between any two adjacent sub-pixelsin the each third pixel element is less than a distance between any twoadjacent third pixel elements; and

a light-emitting area of at least a part of the multiple sub-pixels inthe second display sub-area is greater than a light-emitting area ofsub-pixels, with a same light-emitting color as the part of the multiplesub-pixels, in the first display sub-area.

Optionally in the embodiments of this disclosure, the second displaysub-area includes multiple columns of sub-pixels, at least two columnsof sub-pixels in the second display sub-area are aligned with twocorresponding columns of sub-pixels in the first display sub-area; and

in a row direction, at least one column of sub-pixels in the firstdisplay sub-area are arranged between two adjacent columns of sub-pixelsin the second display sub-area, wherein the row direction isperpendicular to a column direction.

Optionally in the embodiments of this disclosure, the plurality of thirdpixel elements in the second display sub-area are arranged in parallelrows and columns; third pixel elements arranged in adjacent rows arealigned, and third pixel elements arranged in adjacent columns arealigned.

Optionally in the embodiments of this disclosure, the each third pixelelement includes a first sub-pixel, a second sub-pixel and a thirdsub-pixel; the second pixel is arranged between the adjacent firstsub-pixel and third sub-pixel; second sub-pixels of third pixel elementson a same column are arranged on a straight line.

Optionally in the embodiments of this disclosure, among four closestsub-pixels in the second display sub-area, two second sub-pixels of thefour closest sub-pixels are arranged in middle, and a first sub-pixeland a third pixel of the four closest sub-pixels are arranged on twosides of the two second sub-pixels, and a center of each of the twosecond sub-pixels, a center of the first sub-pixel, and a center of thethird sub-pixel are connected to form a triangle.

Optionally in the embodiments of this disclosure, among three adjacentcolumns of sub-pixels in the second display sub-area, a middle column ofsub-pixels are second sub-pixels, and two columns of sub-pixels on twosides of the middle column of sub-pixels are first sub-pixels and thirdsub-pixels; the first sub-pixels and the third sub-pixels arealternately arranged; the first sub-pixels and the third sub-pixels ofthe two columns of sub-pixels are arranged on a straight line.

Optionally in the embodiments of this disclosure, the first displaysub-area includes first sub-pixels, second sub-pixels and thirdsub-pixels; the first display sub-area includes a plurality of secondsub-pixel columns extending along a column direction, and sub-pixelcolumns arranged on an edge of the first display sub-area are secondsub-pixel columns; sub-pixels, adjacent to the second sub-pixel columnsarranged on the edge of the first display sub-area, in the seconddisplay sub-area are the first sub-pixels or the third sub-pixels.

Optionally in the embodiments of this disclosure, in the second displaysub-area, a light-emitting area of a second sub-pixel is less than alight-emitting area of a third sub-pixel, and a size of a secondsub-pixel in the column direction is less than half of a size of a thirdsub-pixel in the column direction.

Optionally in the embodiments of this disclosure, the first displaysub-area includes multiple columns of sub-pixels; a part of the multiplecolumns of sub-pixels are the second sub-pixels, and the remainingcolumns of the multiple columns of sub-pixels are the first sub-pixelsand the third sub-pixels alternately arranged, wherein the firstsub-pixels and the third sub-pixels are arranged on a straight line.

Optionally in the embodiments of this disclosure, at least one sub-pixelhas different shapes in the first display sub-area and the seconddisplay sub-area.

Optionally in the embodiments of this disclosure, in the first displaysub-area, a quantity of the second sub-pixels is greater than a quantityof the first sub-pixels or a quantity of the third sub-pixels; in asub-pixel column where the first sub-pixels and the third sub-pixels arealternately arranged, adjacent first sub-pixel and third sub-pixel forma triangle with a second sub-pixel of an adjacent column on left orright of the sub-pixel column, respectively.

Optionally in the embodiments of this disclosure, in the first displaysub-area, a distance between centers of any two adjacent sub-pixels in asub-pixel column is identical; and a distance between centers of any twoadjacent sub-pixels in a sub-pixel row is identical.

Optionally in the embodiments of this disclosure, multiple sub-pixelrows of the first display sub-area each includes alternately arrangedfirst sub-pixels and third sub-pixels, wherein in two adjacent sub-pixelrows of the multiple sub-pixel rows, first sub-pixels and thirdsub-pixels of one row of the two adjacent sub-pixel rows are arranged ina staggered arrangement with first sub-pixels and third sub-pixels ofother row of the two adjacent sub-pixel rows, and the first sub-pixelsand the third sub-pixels are arranged on a straight line in the rowdirection.

Optionally in the embodiments of this disclosure, the second displaysub-area includes multiple rows of third pixel elements; in a row ofthird pixel elements, a straight line in the row direction passesthrough two adjacent third pixel elements; and two sub-pixelsrespectively arranged on two adjacent edges of the two adjacent thirdpixel elements are arranged on the straight line, wherein light-emittingcolors of the two sub-pixels are different.

Optionally in the embodiments of this disclosure, the first sub-pixelemits blue light, the second sub-pixel emits green light and the thirdsub-pixel emits red light.

In second aspect, the embodiments of this disclosure further provide adisplay substrate including a display are including a first displaysub-area and a second display sub-area,

a distribution density of pixels in the first display sub-area isgreater than a distribution density of pixels in the second displaysub-area;

both the first display sub-area and the second display sub-area includemultiple columns of sub-pixels parallel to each other, and a column ofsub pixels in the first display sub-area are aligned with acorresponding column of sub pixels in second display sub-area; and

a light-emitting area of at least a part of the multiple sub-pixels inthe second display sub-area is greater than a light-emitting area ofsub-pixels, with a same light-emitting color as the part of the multiplesub-pixels, in the first display sub-area.

Optionally, in the embodiments of this disclosure, the second displaysub-area includes first sub-pixels, second sub-pixels and thirdsub-pixels; in the second display sub-area, a center of a firstsub-pixel, a center of a second sub-pixel and a center of a thirdsub-pixel are connected to form an isosceles triangle; the firstsub-pixel, the second sub-pixel and the third sub-pixel are adjacent toeach other.

Optionally, in the embodiments of this disclosure, in the second displaysub-area, two first sub-pixels and two third sub-pixels adjacent to eachother form a rectangle, and a second sub-pixel is arranged in a centerof the rectangle.

Optionally, in the embodiments of this disclosure, the second sub-pixelsin the second display sub-area are arranged in multiple rows, the secondsub-pixels in two adjacent rows of second sub-pixels are staggered.

Optionally, in the embodiments of this disclosure, the second displaysub-area includes multiple columns of sub-pixels extending along thecolumn direction; and in the columns direction, at least one sub-pixelcolumn of the first display sub-area is arranged between at least twoadjacent sub-pixel columns in the second display sub-area.

Optionally, in the embodiments of this disclosure, the first displaysub-area includes first sub-pixels, second sub-pixels and thirdsub-pixels; and the first display sub-area includes multiple columns ofsecond sub-pixels extending along the column direction, and a sub-pixelrow at the edge of the first display sub-area is a second sub-pixel row.

Optionally, in the embodiments of this disclosure, the sub-pixelsadjacent to the second sub-pixel column at the edge of the first displaysub-area are first sub-pixels and third sub-pixels; and among thesub-pixels adjacent to the second sub-pixel column, a part of thesub-pixels arranged in the first display sub-area have the same color,and the remaining part of the sub-pixels arranged in the second displaysub-area have the same color.

Optionally, in the embodiments of this disclosure, in the first displaysub-area, a second sub-pixel can form a triangle with an adjacent firstsub-pixel and an adjacent third sub-pixel, the adjacent first sub-pixeland the adjacent third sub-pixel can arranged at one side of a row wherethe second sub-pixel is located, or the adjacent first sub-pixel and theadjacent third sub-pixel can arranged at the other side of the row wherethe second sub-pixel is located.

Optionally, in the embodiments of this disclosure, in the second displaysub-area, the first sub-pixel and the third sub-pixel closest to a rowof second sub-pixels are alternately arranged along the row direction.

Optionally, in the embodiments of this disclosure, in the first displaysub-area, first sub-pixels in one sub-pixel row are aligned with thirdsub-pixels in another sub-pixel row adjacent to the one sub-pixel row.

Optionally, in the embodiments of this disclosure, in the first displaysub-area, first sub-pixels in one sub-pixel row are aligned with thirdsub-pixels in another sub-pixel row adjacent to the one sub-pixel row.

Optionally, in the embodiments of this disclosure, at least onesub-pixel in the second display sub-area and at least one sub-pixel inthe first display sub-area with the same color as the at least onesub-pixel in the second display sub-area have effective light-emittingareas with different shapes.

Optionally, in the embodiments of this disclosure, the first sub-pixelemits blue light, the second sub-pixel 2 emits green light, and thethird sub-pixel 3 emits red light.

Correspondingly the embodiments of this disclosure provide displaydevice, the display device includes the above display substrate providedin the first aspect of embodiments of the present disclosure.

Correspondingly the embodiments of this disclosure further providedisplay device, the display device includes the above display substrateprovided in the second aspect of embodiments of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is a first schematic structural diagram of a display substrateaccording to an embodiment of this disclosure.

FIG. 1B is a second schematic structural diagram of the displaysubstrate according to an embodiment of this disclosure.

FIG. 1C is a third schematic structural diagram of the display substrateaccording to an embodiment of this disclosure.

FIG. 1D is a fourth schematic structural diagram of the displaysubstrate according to an embodiment of this disclosure.

FIG. 1E is a fifth schematic structural diagram of the display substrateaccording to an embodiment of this disclosure.

FIG. 1F is a sixth schematic structural diagram of the display substrateaccording to an embodiment of this disclosure.

FIG. 1G is a seventh schematic structural diagram of the displaysubstrate according to an embodiment of this disclosure.

FIG. 1H is an eighth schematic structural diagram of the displaysubstrate according to an embodiment of this disclosure.

FIG. 1I is a ninth schematic structural diagram of the display substrateaccording to an embodiment of this disclosure.

FIG. 2 is a first schematic structural diagram of a part of the displaysubstrate according to an embodiment of this disclosure.

FIG. 3 is a second schematic structural diagram of a part of the displaysubstrate according to an embodiment of this disclosure.

FIG. 4 is a third schematic structural diagram of a part of the displaysubstrate according to an embodiment of this disclosure.

FIG. 5 is a fourth schematic structural diagram of a part of the displaysubstrate according to an embodiment of this disclosure.

FIG. 6 is a fifth schematic structural diagram of a part of the displaysubstrate according to an embodiment of this disclosure.

FIG. 7 is a sixth schematic structural diagram of a part of the displaysubstrate according to an embodiment of this disclosure.

FIG. 8 is a seventh schematic structural diagram of a part of thedisplay substrate according to an embodiment of this disclosure.

FIG. 9 is an eighth schematic structural diagram of a part of thedisplay substrate according to an embodiment of this disclosure.

FIG. 10 is a ninth schematic structural diagram of a part of the displaysubstrate according to an embodiment of this disclosure.

FIG. 11 is a tenth schematic structural diagram of a part of the displaysubstrate according to an embodiment of this disclosure.

FIG. 12 is an eleventh schematic structural diagram of a part of thedisplay substrate according to an embodiment of this disclosure.

FIG. 13 is a twelfth schematic structural diagram of a part of thedisplay substrate according to an embodiment of this disclosure.

FIG. 14 is a schematic flow chart of a method for driving the displaysubstrate according to an embodiment of this disclosure.

FIG. 15 is a demo diagram of the display substrate according to anembodiment of this disclosure, which is being scanned.

FIG. 16 is a schematic structural diagram of a fine metal mask accordingto an embodiment of this disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The embodiments of this disclosure provide a display substrate, a methodfor driving the same, a display device, and a fine metal mask. In orderto make the objects, technical solutions, and advantages of thisdisclosure more apparent, this disclosure will be described below infurther details with reference to the drawings. Apparently theembodiments to be described are only a part but not all of theembodiments of this disclosure. Based upon the embodiments here of thisdisclosure, all the other embodiments which can occur to thoseordinarily skilled in the art without any inventive effort shall comeinto the scope of this disclosure as claimed.

The shapes and the sizes of respective components in the drawings arenot intended to reflect any real proportion, but only intended toillustrate the disclosure of this application.

As illustrated in FIG. 1A to FIG. 1I, a display substrate according toan embodiment of this disclosure includes a display area including afirst display sub-area A1 and a second display sub-area A2, where adistribution density of pixels in the first display sub-area A1 ishigher than a distribution density of pixels in the second displaysub-area A2.

In the display substrate according to an embodiment of this disclosure,the display area includes the first display sub-area in which pixels aredistributed at a high density (e.g., a high resolution), and the seconddisplay sub-area in which pixels are distributed at a low density (e.g.,a low resolution). Since the distribution density of pixels in thesecond display sub-area is lower, a camera and other elements can bearranged in the second display sub-display area, that is, thedistribution density of the local pixels can be lowered to therebyimprove the transmittivity of a screen so as to improve a screen topanel ratio of the display substrate.

It shall be noted that the distribution density of pixels can refer tothe number of pixels arranged uniformly in a unit of area. If there area large number of pixels arranged in a unit of area, then there will bea high distribution density of pixels, and thus a high resolution; andif there are a small number of pixels arranged in a unit of area, thenthere will be a low distribution density of pixels, and thus a lowresolution.

Furthermore in an embodiment of this disclosure, the distributiondensity of pixels is particularly calculated in the equation of

${\rho = \frac{\sqrt{x^{2} + y^{2}}}{S}},$

where ρ represents the distribution density of pixels, x represents thenumber of display elements in the row direction, y represents the numberof display elements in the column direction, and S represents the areaof a screen.

In a particular implementation, in the display substrate according to anembodiment of this disclosure, the number of second display sub-areasmay be one or more; and the first display sub-area may be a consecutivearea, or may be an inconsecutive area, dependent upon a real applicationenvironment, although an embodiment of the invention will not be limitedthereto.

In a particular implementation, in the display substrate according to anembodiment of this disclosure, as illustrated in FIG. 1A to FIG. 1G, atleast a part of sides of the second display sub-area A2 coincide with atleast a part of sides of the display area, and the other sides of thesecond display sub-area A2 are surrounded by the first display sub-areaA1, so that the second display sub-area A2 can be arranged at the edgeof the display area.

In a particular implementation, in the display substrate according to anembodiment of this disclosure, as illustrated in FIG. 1H and FIG. 1I,the first display sub-area A1 is arranged to surround the second displaysub-area A2 so that the second display sub-area A2 can be arranged inthe display area.

Furthermore in a particular implementation, the shape of the seconddisplay sub-area A2 can be arranged as a regular shape, and asillustrated in FIG. 1A to FIG. 1C, for example, the second displaysub-area A2 can be arranged as a rectangle, where a top corner of therectangle can be a right angle or can be an arc angle. As illustrated inFIG. 1D, the second display sub-area A2 can be arranged as a trapezium,where a top corner of the trapezium can be a normal angle or can be anarc angle. As illustrated in FIG. 1H and FIG. 1I, the second displaysub-area A2 can be arranged as a round. Of course, the shape of thesecond display sub-area A2 can be arranged as an irregular shape. Asillustrated in FIG. 1E, for example, the second display sub-area A2 canbe arranged as a drop shape. Of course, the shape of the second displaysub-area can be designed according to the shape of an element arrangedin the second display sub-area in a real application, although anembodiment of this disclosure will not be limited thereto.

Optionally in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 1A to FIG. 1I, the first displaysub-area A1 and the second display sub-area A2 form the consecutivedisplay area, and the shape of the display area is substantiallyrectangular, so that the first display sub-area A1 and the seconddisplay sub-area A2 can be formed as complementary patterns to form theconsecutive display area. Furthermore, for example, if each top cornerof the display area is a right angle, then the display area will be arectangle, or if each top corner of the display area is an arc angle,then the shape of the display area will be substantially rectangular.

In a particular implementation, in the display substrate according to anembodiment of this disclosure, a relative positional relationshipbetween the first display sub-area and the second display sub-area, andtheir shapes will not be limited to any particular relative positionalrelationship and shapes, but can be arranged according to a screendesign of the display substrate. For a mobile phone, for example, thesecond display sub-area A2 can be arranged at the top-left corner of thefirst display sub-area A1 as illustrated in FIG. 1A. The second displaysub-area A2 can be arranged at the top-right corner of the first displaysub-area A1 as illustrated in FIG. 1B. The second display sub-area A2can be arranged at the middle of the top of the first display sub-areaA1 as illustrated in FIG. 1C to FIG. 1E. The first display sub-area A1and the second display sub-area A2 can be arranged in the row directionas illustrated in FIG. 1F, where the second display sub-area A2 can belocated above or below the first display sub-area A1. In this way, asensor, e.g., a sensor for recognizing a human face (e.g., an infraredsensor, etc.), can be further arranged in the second display sub-areaA2. The first display sub-area A1 and the second display sub-area A2 canbe arranged in the column direction as illustrated in FIG. 1G, where thesecond display sub-area A2 can be located to the left or right of firstdisplay sub-area A1. In this way, a sensor, e.g., a sensor forrecognizing a human face (e.g., an infrared sensor, etc.), can befurther arranged in the second display sub-area A2. The second displaysub-area A2 can be arranged at the center of the first display sub-areaA1 as illustrated in FIG. 1H. The second display sub-area A2 can bearranged at a corner (e.g., the top-left corner) of the display area asillustrated in FIG. 1I. Of course, the particular position of the seconddisplay area A2 can be determined according to a real applicationenvironment in a real application, although an embodiment of theinvention will not be limited thereto.

In a particular implementation, in the display substrate according to anembodiment of this disclosure, the distribution density of pixels in thesecond display sub-area is determined according to an element arrangedin the second display sub-area, and a display demand, although anembodiment of the invention will not be limited thereto. For example, acamera is arranged in the second display sub-area, and if thedistribution density of pixels is too high, then a good display effectwill be guaranteed, but a definition of photographing may be degraded,or if the distribution density of pixels is too low, then a highdefinition of photographing will be guaranteed, but the display effectmay be degraded. In a particular implementation, there is such anattainable resolution of the existing display substrate that thedistribution density of pixels in the second display sub-area isgenerally no lower than the distribution density of pixels in the firstdisplay sub-area by a factor of ¼. For example, the distribution densityof pixels in the second display sub-area is ½, ⅓, or ¼ of thedistribution density of pixels in the first display sub-area. Of course,if the resolution of the display substrate is made higher, then theratio of the distribution density of pixels in the second displaysub-area to the distribution density in the first display sub-area maybe set smaller.

In a particular implementation, in the display substrate according to anembodiment of this disclosure, as illustrated in FIG. 1A to FIG. 1I, thearea of the second display sub-area A2 can be smaller than the area ofthe first display sub-area A1. Of course, the area of the second displaysub-area can be designed according to an element arranged in the seconddisplay sub-area in a real application, although an embodiment of thisdisclosure will not be limited thereto.

Pixel elements are generally arranged in the display area, and eachpixel element includes a plurality of sub-pixels; and a pixel in anembodiment of this disclosure may refer to a combination of sub-pixelswhich can display an image at a pixel point independently, and forexample, a pixel may refer to a pixel element. Optionally in the displaysubstrate according to an embodiment of this disclosure, as illustratedin FIG. 2 to FIG. 13 , the first display sub-area A1 includes aplurality of first pixel elements 10 and second pixel elements 20arranged adjacent to each other, where each first pixel element 10includes a first sub-pixel 1 and a second sub-pixel 2, and each secondpixel element 20 includes a third sub-pixel 3 and a second sub-pixel 2.In order to display an image, the number of pixels in the first displaysub-area A1 is equal to the sum of the number of first pixel elements10, and the number of second pixel elements 20, that is, the pixels arearranged in a pan tile pattern in the first display sub-area A1, and theimage can be displayed at the pixel elements at a higher resolution thana physical resolution by borrowing the sub-pixels in their adjacentpixel elements.

The second display sub-area A2 includes a plurality of third pixelelements 30, such as, each third pixel element 30 can be regarded apixel island; and each third pixel element 30 includes a first sub-pixel1, a second sub-pixel 2, and a third sub-pixel 3 arranged adjacent toeach other. In order to display an image, the number of pixels in thesecond display sub-area A2 is equal to the number of third pixelelements 30, that is, a physical resolution of the pixels in the seconddisplay sub-area A2 is the display definition thereof. Moreover in thisembodiment, only an arrangement pattern of the third pixel elements 30in the second display sub-area is illustrated, but a distributiondensity of the third pixel elements 30 in the second display sub-area A2will not be limited to any particular distribution density.

It shall be noted that each pixel element can be a combination ofsub-pixels at a pixel point, and for example, can be a combination ofthree, three, four or more of red, green, and blue sub-pixels, or eachpixel element can be a combination of repeating elements or pixels,e.g., a combination of red, green, and blue sub-pixels.

In a particular implementation, in the display substrate according to anembodiment of this disclosure, two adjacent pixel elements refer to twopixel elements between which there is not any other pixel element. Twoadjacent sub-pixels refer to two sub-pixels between which there is notany other sub-pixel.

It shall be noted that in the display substrate according to anembodiment of this disclosure, since there is a limited space at theedge of a display sub-area, the arrangement of sub-pixels in the firstdisplay sub-area, and the arrangement of sub-pixels in the seconddisplay sub-area generally refer to the arrangements of sub-pixelsinside the display sub-areas, and there may be a different arrangementof some sub-pixels at the edge of the display sub-area, although anembodiment of this disclosure will not be limited thereto.

In a particular implementation, the first sub-pixels, the secondsub-pixels, and the third sub-pixels are generally one of red, green,and blue sub-pixels respectively. Optionally in the display substrateaccording to an embodiment of this disclosure, the second sub-pixels aregreen sub-pixels, the first sub-pixels are red or blue sub-pixels, andthe third sub-pixels are blue or red sub-pixels.

Optionally in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 2 to FIG. 5 , the sub-pixels in thesecond display sub-area A2 can be located in the same row as a part ofthe sub-pixels in the first display sub-area A1 so that the sub-pixelsin the second display sub-area A2 correspond in row direction to thesub-pixels in the first display sub-area A1 instead of being arranged ina different row or column from the latter sub-pixels. In this way, thedisplay substrate is fabricated in such a way that equivalently a partof the sub-pixels in the second display sub-area in a sub-pixel maskoriginally arranged regularly throughout the display area are removed,thus making it relatively easy to perform a fabrication process.Optionally in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 6 to FIG. 13 , the sub-pixels in thesecond display sub-area A2 can be located in the same column as a partof the sub-pixels in the first display sub-area A1 so that thesub-pixels in the second display sub-area A2 correspond in columndirection to the sub-pixels in the first display sub-area A1 instead ofbeing arranged in a different row or column from the latter sub-pixels.In this way, the display substrate is fabricated in such a way that apart of the sub-pixels in the second display sub-area in a sub-pixelmask originally arranged regularly throughout the display area areremoved, thus making it relatively easy to perform a fabricationprocess. As illustrated in FIG. 2 , for example, equivalently a half ofthe second sub-pixels in the second display sub-area A2 are removed ascompared with the first display sub-area A1, so the resolution of thesecond display sub-area A2 is ½ of the resolution of the first displaysub-area A1. As illustrated in FIG. 3 , for example, equivalently ¾ ofthe second sub-pixels in the second display sub-area A2 are removed ascompared with the first display sub-area A1, so the resolution of thesecond display sub-area A2 is ¼ of the resolution of the first displaysub-area A1.

Optionally in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 2 to FIG. 8 , a light-emitting areaof a first sub-pixel 1 in the second display sub-area A2 issubstantially equal to a light-emitting area of a first sub-pixel 1 inthe first display sub-area A1, and a light-emitting area of a thirdsub-pixel 3 in the second display sub-area A2 is substantially equal toa light-emitting area of a third sub-pixel 3 in the first displaysub-area A1. As illustrated in FIG. 2 to FIG. 7 , a light-emitting areaof a second sub-pixel 2 in the second display sub-area A2 issubstantially equal to a light-emitting area of a second sub-pixel 2 inthe first display sub-area A1.

In a particular implementation, the distribution density of pixels inthe second display sub-area is lower than the distribution density ofpixels in the first display sub-area, so in order to display an image,brightness in the second distribution density of pixels is lower thanbrightness in the first distribution density of pixels so that there maybe an apparent dark strip visible to human eyes, at the interfacebetween the first display sub-area and the second display sub-area.Optionally in order to alleviate the dark strip, in the displaysubstrate according to an embodiment of this disclosure, as illustratedin FIG. 9 to FIG. 13 , a light-emitting area of a first sub-pixel 1 inthe second display sub-area A2 is larger than a light-emitting area of afirst sub-pixel 1 in the first display sub-area A1, a light-emittingarea of a second sub-pixel 2 in the second display sub-area A2 is largerthan a light-emitting area of a second sub-pixel 2 in the first displaysub-area A1, and a light-emitting area of a third sub-pixel 1 in thesecond display sub-area A2 is larger than a light-emitting area of athird sub-pixel 1 in the first display sub-area A1, that is, thelight-emitting areas of the sub-pixels in the second display sub-area A2can be increased to thereby lower the difference in brightness betweenthe second display sub-area A2 and the first display sub-area A1 so asto alleviate the dark strip at the interface between the second displaysub-area A2 and the first display sub-area A1.

Optionally in the display substrate according to an embodiment of thisdisclosure, a plurality of third pixel elements 30 are arranged in amatrix in the second display sub-area A2 as illustrated in FIG. 2 toFIG. 5 , and FIG. 7 to FIG. 10 .

Optionally in the display substrate according to an embodiment of thisdisclosure, a plurality of third pixel elements 30 are arranged in atessellated pattern in the second display sub-area A2 as illustrated inFIG. 6 , and FIG. 11 to FIG. 13 , that is, the third pixel elements 30are arranged in every other column in the row direction, and in everyother row in the column direction. As illustrated in FIG. 6 , forexample, the third pixel elements 30 in the odd rows are arranged in theodd columns, and the third pixel elements 30 in the even rows arearranged in the even rows, so that the third pixel elements 30 aredistributed uniformly in both the row direction and the columndirection, thus resulting in uniform brightness in the second displaysub-area A2. For example, alternatively the third pixel elements 30 inthe odd rows can be arranged in the even columns, and the third pixelelements 30 in the even rows can be arranged in the odd columns, so thatany two third pixel elements are spaced from each other by a specificspacing, where for example, the spacing can be the length of at leastone third pixel element in the row direction, and the length of at leastone third pixel element in the column direction, although an embodimentof this disclosure will not be limited thereto.

Optionally in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 5 and FIG. 10 , in each third pixelelement 30 in the second display sub-area A2, the first sub-pixel 1 andthe third sub-pixel 3 are arranged in the same row, and the secondsub-pixel 2 is located in an adjacent row to the row in which the firstsub-pixel 1 and the third sub-pixel 3 are located. For example, thefirst sub-pixel 1 and the third sub-pixel 3 in the same third pixelelement 30 are located in the first row, and the second sub-pixel 2 islocated in the second row, so that lines connecting the centers of thefirst sub-pixel, the second sub-pixel, and the third sub-pixel in thesame third pixel element 30 constitute a triangle to thereby avoidtraverse bright and dark strips from occurring in the second displaysub-area.

It shall be noted that in the display substrate according to anembodiment of this disclosure, the center of a sub-pixel refers to thecenter of a light-emitting area of the sub-pixel. Taking an OLED displaypanel as an example, a sub-pixel generally includes an anode layer, alight-emitting layer, and a cathode layer structured in a stack, wherein order to display an image, the light-emitting area corresponding tothe stack structure is a light-emitting area of the sub-pixel, so thatthe area occupied by the light-emitting area is a light-emitting area.Of course, the light-emitting area can alternatively be an area occupiedby an opening area defined by the pixel definition layer, for example,although an embodiment of this disclosure will not be limited thereto.

Optionally in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 5 and FIG. 10 , in the same thirdpixel element 30, an orthographical projection of the center of thesecond sub-pixel 2 onto the line L1 connecting the center of the firstsub-pixel 1 with the center of the third sub-pixel 3 lies between thecenter of the first sub-pixel 1, and the center of the third sub-pixel3. For example, the orthographical projection of the center of thesecond sub-pixel 2 onto the line L1 connecting the center of the firstsub-pixel 1 with the center of the third sub-pixel 3 lies onto theintersection between the connecting line L1 and the straight line L2. Inthis way, the distance between the center of the second sub-pixel 2, andthe center of the first sub-pixel 1 in the third pixel element 30 can beequal to the distance between the center of the second sub-pixel 2, andthe center of the third sub-pixel 3 so that these three sub-pixels arearranged in an isosceles triangle pattern to thereby avoid verticalbright and dark strips from occurring in the second display sub-area A2.

In a particular implementation, the distance between the center of thesecond sub-pixel 2, and the center of the first sub-pixel 1 may not beexactly equal to the distance between the center of the second sub-pixel2, and the center of the third sub-pixel 3, and there may be some errordue to a limiting process condition or another factor, e.g., anarrangement of wires or through-holes, in a real process, so the shapesand the positions of the respective sub-pixels, and their relativepositional relationship can substantially satisfy the condition abovewithout departing from the scope of this disclosure.

Optionally in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 2 to FIG. 4 , FIG. 6 to FIG. 9 , andFIG. 11 to FIG. 13 , the first sub-pixel 1, the second sub-pixel 2, andthe third sub-pixel 3 in the third pixel element 30 are arranged in thesame row or column in the second display sub-area A2, although anembodiment of this disclosure will not be limited thereto.

Of course, in a particular implementation, in the display substrateaccording to an embodiment of this disclosure, as illustrated in FIG. 2to FIG. 4 , FIG. 6 to FIG. 9 , and FIG. 11 to FIG. 13 , the firstsub-pixel 1, the second sub-pixel 2, and the third sub-pixel 3 in thethird pixel element 30 are arranged successively in the same row orcolumn in the second display sub-area A2, although an embodiment of thisdisclosure will not be limited thereto. Furthermore, of course, in aparticular implementation, in the display substrate according to anembodiment of this disclosure, as illustrated in FIG. 2 to FIG. 4 , FIG.6 to FIG. 9 , and FIG. 11 to FIG. 13 , the first sub-pixel 1, the secondsub-pixel 2, and the third sub-pixel 3 in the third pixel element 30 arearranged adjacent to each other in order in the same row or column inthe second display sub-area A2, although an embodiment of thisdisclosure will not be limited thereto.

Optionally in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 2 , FIG. 4 to FIG. 6 , and FIG. 12 ,in the second display sub-area A2, the sub-pixels in two third pixelelements 30 adjacent in the row direction are arranged in the same orderin the row direction, and the sub-pixels in two third pixel elements 30adjacent in the column direction are arranged in opposite orders in therow direction, so that the first sub-pixels 1 and the third sub-pixels 3can be arranged alternately in the column direction in the seconddisplay sub-area A2 to thereby avoid a color crosstalk from occurring inthe column direction. As illustrated in FIG. 2 , for example, taking thefirst row of third pixel elements 30 as an example, the first sub-pixel1, the second sub-pixel 2, and the third sub-pixel 3 in each of twoadjacent third pixel elements 30 are arranged successively from the leftto the right in the row direction. Taking the first column of thirdpixel elements 30 as an example, in the column direction, the firstsub-pixel 1, the second sub-pixel 2, and the third sub-pixel 3 in eachthird pixel element 30 in an odd row are arranged successively from theleft to the right, and the first sub-pixel 1, the second sub-pixel 2,and the third sub-pixel 3 in each third pixel element 30 in an even roware arranged successively from the left to the right. As illustrated inFIG. 5 , for example, taking the first row of third pixel elements 30 asan example, the first sub-pixel 1, the second sub-pixel 2, and the thirdsub-pixel 3 in each of two adjacent third pixel elements 30 are arrangedin an upside-down triangle pattern in the row direction. Taking thefirst column of third pixel elements 30 as an example, in the columndirection, the first sub-pixel 1, the second sub-pixel 2, and the thirdsub-pixel 3 in each third pixel element 30 in an odd row are arranged inan upside-down triangle patter, and the first sub-pixel 1, the secondsub-pixel 2, and the third sub-pixel 3 in each third pixel element 30 inan even row are arranged in an upside-down triangle patter.

In a particular implementation, in the display substrate according to anembodiment of this disclosure, the sub-pixels in each third pixelelement in the second display sub-area A2 can be arranged in the sameorder as illustrated in FIG. 2 , and FIG. 7 to FIG. 11 .

In a particular implementation, in the display substrate according to anembodiment of this disclosure, the sub-pixels in each third pixelelement 30 in the same column are arranged in the same order, and thesub-pixels in the third pixel elements 30 in two adjacent columns arearranged in opposite orders, in the second display sub-area A2 asillustrated in FIG. 13 . For example, the first sub-pixel 1, the secondsub-pixel 2, and the third sub-pixel 3 in each third pixel element 30 inan odd column are arranged successively from the left to the right, andthe second sub-pixel 2, and the third sub-pixel 3 in each third pixelelement 30 in an even column are arranged successively from the left tothe right.

In a particular implementation, in the display substrate according to anembodiment of this disclosure, the shapes of the first sub-pixels 1, thesecond sub-pixels 2, and the third sub-pixels 3 are substantially thesame in the second display sub-area A2 as illustrated in FIG. 2 to FIG.6 , and FIG. 8 to FIG. 13 .

In a particular implementation, in the display substrate according to anembodiment of this disclosure, a light-emitting area of a secondsub-pixel is smaller than or substantially equal to a light-emittingarea of a first sub-pixel, and a light-emitting area of a secondsub-pixel is smaller than or substantially equal to a light-emittingarea of a third sub-pixel, in the second display sub-area. Asillustrated in FIG. 2 to FIG. 6 , for example, a light-emitting area ofa second sub-pixel 2 is substantially equal to a light-emitting area ofa first sub-pixel 1, and a light-emitting area of a second sub-pixel 2is substantially equal to a light-emitting area of a third sub-pixel 3,in the second display sub-area A2. As illustrated in FIG. 7 to FIG. 13 ,a light-emitting area of a second sub-pixel 2 is smaller than to alight-emitting area of a first sub-pixel 1, and a light-emitting area ofa second sub-pixel 2 is smaller than or substantially equal to alight-emitting area of a third sub-pixel 3, in the second displaysub-area. Of course, the relationship between a light-emitting area of asecond sub-pixel, a light-emitting area of a first sub-pixel, and alight-emitting area of a third sub-pixel in the second display sub-areacan be determined according to a real application, although anembodiment of this disclosure will not be limited thereto.

In a particular implementation, in the display substrate according to anembodiment of this disclosure, as illustrated in FIG. 2 to FIG. 13 , alight-emitting area of a first sub-pixel 1 is substantially equal to alight-emitting area of a third sub-pixel 3 in the second displaysub-area A2.

Optionally in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 2 to FIG. 13 , the first pixelelements 10 and the second pixel elements 20 in the first displaysub-area A1 can be arranged in any pan tile pattern, although anembodiment of this disclosure will not be limited thereto.

Optionally in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 2 to FIG. 13 , the first pixelelements 10 and the second pixel elements 20 are arranged alternately inthe column direction, and the first pixel elements 10 and the secondpixel elements 20 are arranged alternately in the row direction, in thefirst display sub-area A1.

Optionally in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 2 to FIG. 6 , the second sub-pixel 2and the first sub-pixel 1 in each first pixel element 10 are arranged inthe same row, and the second sub-pixel 2 and the third sub-pixel 3 ineach second pixel element 20 are arranged in the same row, in the firstdisplay sub-area A1; and for the first pixel element 10 and the secondpixel element 20 adjacent in the row direction, the second sub-pixel 2in the first pixel element 10 is not immediately adjacent to the secondsub-pixel 2 in the second pixel element 20. For example, for the firstpixel element 10 and the second pixel element 20 adjacent in the rowdirection, the second sub-pixel 2 in the first pixel element 10 isspaced from the second sub-pixel 2 in the second pixel element 20 by thethird sub-pixel 3. Of course, there may be alternative implementationsto the implementation above, and a repeated description thereof will beomitted here.

Furthermore in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 2 to FIG. 6 , a light-emitting areaof a first sub-pixel 1, a light-emitting area of a second sub-pixel 2,and a light-emitting area of a third sub-pixel 3 can be substantiallythe same in the first display sub-area A2.

Optionally in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 7 to FIG. 13 , the second sub-pixel 2and the first sub-pixel 1 in each first pixel element 10 are staggeredin rows and columns, and the second sub-pixel 2 and the third sub-pixel3 in each second pixel element 20 are arranged in the same row, in thefirst display sub-area A1; and the first pixel element 10 and the secondpixel element 20 adjacent in the column direction are a group of pixels100, and in the same group of pixels 100, the second sub-pixel 2 in thefirst pixel element 10, and the third sub-pixel 3 in the second pixelelement 20 are arranged in the same row, and the second sub-pixel 2 inthe first pixel element 10, and the second sub-pixel 2 in the secondpixel element 20 are located in the same column.

Furthermore in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 7 to FIG. 12 , two second sub-pixels2 in the same group of pixels 100 are arranged adjacent to each other inthe column direction, and the two second sub-pixels 2 are symmetric inthe row direction even if they are arranged in a mirror pattern.Furthermore, in the first display sub-area A1, when the secondsub-pixels 2 are green sub-pixels, the total light-emitting area of twosecond sub-pixels 2 is smaller than a light-emitting area of a firstsub-pixel 1, and the total light-emitting area of two second sub-pixels2 is smaller than a light-emitting area of a third sub-pixel 3, becausethe green sub-pixels have higher light-emission efficiency than that ofthe sub-pixels in the other colors.

Optionally in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 2 to FIG. 13 , the sub-pixels in eachfirst pixel element 10 are arranged in the same order, and thesub-pixels in each second pixel element 20 are arranged in the sameorder, in the first display sub-area. As illustrated in FIG. 2 to FIG. 6, for example, the first sub-pixel 1 and the second sub-pixel 2 in eachfirst pixel element 10 are arranged successively from the left to theright, and the third sub-pixel 3 and the second sub-pixel 2 in eachsecond pixel element 20 are arranged successively from the left to theright. As illustrated in FIG. 7 to FIG. 13 , the second sub-pixel 2 andthe third sub-pixel 3 in each second pixel element 20 are arrangedsuccessively from the left to the right, and the first sub-pixel 1 andthe second sub-pixel 2 in each first pixel element 10 are arrangedsuccessively from the top left to the bottom right.

Optionally in the display substrate according to an embodiment of thisdisclosure, a light-emitting area of a second sub-pixel is not largerthan a light-emitting area of a first sub-pixel, and a light-emittingarea of a second sub-pixel is not larger than a light-emitting area of athird sub-pixel, in the first display sub-area. As illustrated in FIG. 2to FIG. 6 , for example, a light-emitting area of a second sub-pixel 2is substantially equal to a light-emitting area of a first sub-pixel 1,and a light-emitting area of a second sub-pixel 2 is substantially equalto a light-emitting area of a third sub-pixel 3, in the first displaysub-area A1. As illustrated in FIG. 7 to FIG. 13 , a light-emitting areaof a second sub-pixel 2 is smaller than a light-emitting area of a firstsub-pixel 1, and a light-emitting area of a second sub-pixel 2 issmaller than a light-emitting area of a third sub-pixel 3, in the firstdisplay sub-area A1. Since the number of first sub-pixels 1 is the sameas the number of third sub-pixels 3, and the number of second sub-pixels2 is twice the number of first sub-pixels 1, in the first displaysub-area A1, the light-emitting area of each second sub-pixel 2 can bemade smaller.

Optionally in the display substrate according to an embodiment of thisdisclosure, a light-emitting area of a first sub-pixel 1 issubstantially equal to a light-emitting area of a third sub-pixel 3 inthe first display sub-area A1 as illustrated in FIG. 2 to FIG. 13 .

In the display substrate according to an embodiment of this disclosure,the shapes of the first sub-pixels, the second sub-pixels, and the thirdsub-pixels in the first display sub-area will not be limited to anyparticular shapes, and may be regular or irregular shapes. In aparticular implementation, a regular shape is generally easy to formfrom the perspective of a process.

In the display substrate according to an embodiment of this disclosure,the shapes of the first sub-pixels, the second sub-pixels, and the thirdsub-pixels in the second display sub-area will not be limited to anyparticular shapes, and may be regular or irregular shapes. In aparticular implementation, a regular shape is generally easy to formfrom the perspective of a process.

Optionally in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 7 to FIG. 12 , the shapes of thefirst sub-pixel 1 and the third sub-pixel 3 are the same, and the shapeof a combination of two second sub-pixels 2 is the same as the shape ofthe first sub-pixel 1 or the third sub-pixel 3, in the same group ofpixels 100.

Optionally in the display substrate according to an embodiment of thisdisclosure, the shape of a first sub-pixel is at least one of arectangle and a hexagon. As illustrated in FIG. 2 to FIG. 6 , forexample, the shape of a first sub-pixel 1 in each of the first displaysub-area A1 and the second display sub-area A2 is rectangular. Asillustrated in FIG. 7 to FIG. 12 , the shape of a first sub-pixel 1 ineach of the first display sub-area A1 and the second display sub-area A2is hexagonal. Of course, the shape of a first sub-pixel canalternatively be a rounded shape, elliptic, etc., although an embodimentof this disclosure will not be limited thereto.

Optionally in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 7 to FIG. 12 , both of the shapes ofthe first sub-pixels 1 and the third sub-pixels 3 are hexagonal, and theshape of a combination of two sub-pixels 2 is hexagonal, in the firstdisplay sub-area A1.

Optionally in the display substrate according to an embodiment of thisdisclosure, the shape of at least one of a first sub-pixel and a thirdsub-pixel in the second display sub-area is substantially the same asthe shape of a first sub-pixel in the first display sub-area. Asillustrated in FIG. 2 to FIG. 13 , for example, the shape of a firstsub-pixel 1 in the second display sub-area A2 is substantially the sameas the shape of a first sub-pixel 1 in the first display sub-area A1. Asillustrated in FIG. 2 to FIG. 13 , the shape of a third sub-pixel 3 inthe second display sub-area A2 is substantially the same as the shape ofa first sub-pixel 1 in the first display sub-area A1. As illustrated inFIG. 2 to FIG. 13 , the shape of a first sub-pixel 1, and the shape of athird sub-pixel 3 respectively in the second display sub-area A2 aresubstantially the same as the shape of a first sub-pixel 1 in the firstdisplay sub-area A1.

Optionally in the display substrate according to an embodiment of thisdisclosure, the shape of one of a first sub-pixel and a second sub-pixelin the first display sub-area is substantially the same as the shape ofa second sub-pixel in the second display sub-area. As illustrated inFIG. 2 to FIG. 6 , and FIG. 8 to FIG. 13 , for example, the shape of afirst sub-pixel 1 in the first display sub-area A1 is substantially thesame as the shape of a second sub-pixel 2 in the second display sub-areaA2. As illustrated in FIG. 7 , the shape of a second sub-pixel 2 in thefirst display sub-area A1 is substantially the same as the shape of asecond sub-pixel 2 in the second display sub-area A2.

It shall be noted the shapes of the respective first sub-pixels 1, therespective second sub-pixels 2, and the respective third sub-pixels 3 inthe same sub-area are substantially the same, and although there issubstantially the same shape of these three kinds of sub-pixels, theremay be different light-emitting areas thereof. As illustrated in FIG. 10, for example, a light-emitting area of a second sub-pixel 2 is smallerthan a light-emitting area of a first sub-pixel 1, and a light-emittingarea of a second sub-pixel 2 is smaller than a light-emitting area of athird sub-pixel 3, in the second display sub-area A2. In a realapplication, for example, they can be arranged in an implementation inwhich a light-emitting area of a blue sub-pixel is larger than alight-emitting area of a red sub-pixel, which is larger than alight-emitting area of a green sub-pixel, or a light-emitting area of ablue sub-pixel is larger than a light-emitting area of a greensub-pixel, which is larger than a light-emitting area of a redsub-pixel, although an embodiment of this disclosure will not be limitedthereto.

It shall be noted that in the display substrate according to anembodiment of this disclosure, the shape of a sub-pixel refers to theshape of a light-emitting area of the sub-pixel.

Optionally in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 7 to FIG. 12 , when the secondsub-pixels 2 in the first display sub-area A1 are green sub-pixels, thetotal light-emitting area of two second sub-pixels 2 is smaller than thearea of a first sub-pixel 1, and the total light-emitting area of twosecond sub-pixels 2 is smaller than the area of a third sub-pixel 3,because the green sub-pixels have higher light-emission efficiency thanthat of the sub-pixels in the other colors.

Optionally in the display substrate according to an embodiment of thisdisclosure, as illustrated in FIG. 7 to FIG. 12 , when the secondsub-pixels 2 in the second display sub-area A2 are green sub-pixels, alight-emitting area of a second sub-pixel 2 is smaller than alight-emitting area of a first sub-pixel 1, and a light-emitting area ofa second sub-pixel is smaller than a light-emitting area of a thirdsub-pixel 3.

In a particular implementation, in the display substrate according to anembodiment of this disclosure, the display substrate according to anembodiment of this disclosure generally displays an image by scanningthe first display sub-area row by row. As illustrated in FIG. 15 , forexample, when the first display sub-area A1 and the second displaysub-area A2 are adjacent to each other in the row direction, gate drivercircuits GOA1 to GOA5 output signals row by row, but only the GOA1, theGOA3, and the GOA5 output signals for the second display sub-area A2.

Based upon the same inventive idea, the embodiments of this disclosurefurther provides a display substrate, as illustrated in FIG. 1A to FIG.1I, a display area of the display substrate includes a first displaysub-area A1 and a second display sub-area A2, where a distributiondensity of pixels in the first display sub-area A1 is higher than adistribution density of pixels in the second display sub-area A2. Asillustrated in FIG. 3 , the second display sub-area A2 includes aplurality of third pixel elements 30 (also referred to as pixelislands); each of the plurality of third pixel elements 30 includesmultiple sub-pixels, and a distance between any two adjacent sub-pixelsin the each third pixel element 30 is less than a distance between anytwo adjacent third pixel elements 30; and a light-emitting area of atleast a part of the multiple sub-pixels in the second display sub-areaA2 is greater than a light-emitting area of sub-pixels, with a samelight-emitting color as the part of the multiple sub-pixels, in thefirst display sub-area A1.

In the display substrate according to the embodiment of this disclosure,the display area includes the first display sub-area A1 in which pixelsare distributed at a high density (e.g., a high resolution), and thesecond display sub-area A2 in which pixels are distributed at a lowdensity (e.g., a low resolution). Since the distribution density ofpixels in the second display sub-area A2 is lower, a camera, sensor,earpiece and other elements can be arranged in the second displaysub-display area, that is, the distribution density of the local pixelscan be lowered to thereby improve the transmittivity of a screen so asto improve a screen to panel ratio of the display substrate. Moreover,by setting pixel islands in the second display sub-area A2 andincreasing the light-emitting area of at least part of the sub-pixels inthe second display sub-area A2, dark strip on the interface between thesecond display sub-area A2 and the first display sub-area A1 can beavoided, and the transmittivity of the second display sub-area A2 can beimproved.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 7 and FIG. 8 , the second displaysub-area A2 includes multiple columns of sub-pixels, at least twocolumns of sub-pixels in the second display sub-area A2 are aligned withtwo corresponding columns of sub-pixels in the first display sub-areaA1; and in a row direction, at least one column of sub-pixels in thefirst display sub-area A1 are arranged between two adjacent columns ofsub-pixels in the second display sub-area A2, so as to ensure that thedistribution density of pixels in the first display sub-area A1 isgreater than the distribution density of pixels in the second displaysub-area A2; where the row direction is perpendicular to a columndirection. The meaning of “perpendicular” in this disclosure is that theincluded angle between the row direction and the column direction is 80°to 100°.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 2 to FIG. 5 , the plurality of thirdpixel elements 30 in the second display sub-area A2 are arranged inparallel rows and columns; third pixel elements 30 arranged in adjacentrows are aligned, and third pixel elements 30 arranged in adjacentcolumns are aligned, so that the uniformity of light-emitting of thesecond display sub-area can be maintained.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 2 to FIG. 5 , each of the pluralityof third pixel elements 30 includes a first sub-pixel 1, a secondsub-pixel 2 and a third sub-pixel 3; the second pixel 2 is arrangedbetween the adjacent first sub-pixel 1 and third sub-pixel 2; and secondsub-pixels 2 of third pixel elements 30 on a same column are arranged ona straight line. The second sub-pixel 2 can be a green sub-pixel, sincethe human eyes are most sensitive to green, such arrangement ofsub-pixels can improve the uniformity of pixel distribution.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 5 to FIG. 10 , among four closestsub-pixels in the second display sub-area A2, two second sub-pixels 2 ofthe four closest sub-pixels are arranged in middle, and a firstsub-pixel 1 and a third pixel 3 of the four closest sub-pixels arearranged on two sides of the two second sub-pixels 3, and a center ofeach of the two second sub-pixels 2, a center of the first sub-pixel 1,and a center of the third sub-pixel 3 are connected to form a triangle,that is, lines connecting the centers of the first sub-pixel 1, eachsecond sub-pixel 2, and the third sub-pixel 3 constitute a triangle, sothat the formed triangle can avoid traverse bright and dark strips.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 2 , FIGS. 4 to 6 and FIG. 12 , amongthree adjacent columns of sub-pixels in the second display sub-area A2,a middle column of sub-pixels are second sub-pixels 2, and two columnsof sub-pixels on two sides of the middle column of sub-pixels are firstsub-pixels 1 and third sub-pixels 3, where the first sub-pixels 1 andthe third sub-pixels 3 are alternately arranged; the first sub-pixels 1and the third sub-pixels 3 of the two columns of sub-pixels can bearranged on a straight line to thereby avoid a color crosstalk fromoccurring in the column direction.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 3 , the first display sub-area A1includes first sub-pixels 1, second sub-pixels 2 and third sub-pixels 3;the first display sub-area A1 includes a plurality of second sub-pixelcolumns extending along a column direction, and sub-pixel columnsarranged on an edge of the first display sub-area A1 are secondsub-pixel columns; and sub-pixels, adjacent to the second sub-pixelcolumns arranged on the edge of the first display sub-area A1, in thesecond display sub-area A2 are the first sub-pixels 1 or the thirdsub-pixels 3, so as to ensure the normal light-emitting of the edge areabetween the first display sub-area A1 and the second display sub-areaA2.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 7 , in the second display sub-areaA2, a light-emitting area of a second sub-pixel 2 is less than alight-emitting area of a third sub-pixel 3, and a size of a secondsub-pixel 2 in the column direction is less than half of a size of athird sub-pixel 3 in the column direction. As such, the light-emittingefficiency of the second sub-pixel 2 can be improved.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 2 , the first display sub-area A1includes multiple columns of sub-pixels; a part of the multiple columnsof sub-pixels are the second sub-pixels 2, and the remaining columns ofthe multiple columns of sub-pixels are the first sub-pixels 1 and thethird sub-pixels 3 alternately arranged; the first sub-pixels 1 and thethird sub-pixels 3 are arranged on a straight line, so that theuniformity of light-emitting of the first display sub-area A1 can bemaintained.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 9 , at least one sub-pixel hasdifferent shapes in the first display sub-area A1 and the second displaysub-area A2, so that diffraction problems can be avoided in the seconddisplay sub-area A2.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 5 , in the first display sub-area A1,a quantity of the second sub-pixels 2 is greater than a quantity of thefirst sub-pixels 1 or a quantity of the third sub-pixels 3; in asub-pixel column where the first sub-pixels 1 and the third sub-pixels 3are alternately arranged, adjacent first sub-pixel 1 and third sub-pixel3 form a triangle with a second sub-pixel 2 of an adjacent column onleft or right of the sub-pixel column, respectively. As such, the formedtriangle can avoid traverse bright and dark strips.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 5 , in the first display sub-area A1,a distance between centers of any two adjacent sub-pixels in a sub-pixelcolumn is identical; and a distance between centers of any two adjacentsub-pixels in a sub-pixel row is identical, which can ensure uniformlight emitting.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 6 , multiple sub-pixel rows of thefirst display sub-area A1 each includes alternately arranged firstsub-pixels 1 and third sub-pixels 3; in two adjacent sub-pixel rows ofthe multiple sub-pixel rows, first sub-pixels 1 and third sub-pixels 3of one row of the two adjacent sub-pixel rows are arranged in astaggered arrangement with first sub-pixels 1 and third sub-pixels 3 ofother row of the two adjacent sub-pixel rows; and the first sub-pixels 1and the third sub-pixels 3 are arranged on a straight line in the rowdirection. So that the light emitting of the first display sub-area A1can be guaranteed to be uniform.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 2 , the second display sub-area A1includes multiple rows of third pixel elements 30; in a row of thirdpixel elements 30, a straight line in the row direction passes throughtwo adjacent third pixel elements 30; and two sub-pixels respectivelyarranged on two adjacent edges of the two adjacent third pixel elements30 are arranged on the straight line; and light-emitting colors of thetwo sub-pixels are different, so that bright lines can be avoided.

Optionally in the display substrate according to the embodiment of thisdisclosure, the first sub-pixel 1 emits blue light, i.e., the firstsub-pixel 1 is blue sub-pixel; the second sub-pixel 2 emits green light,i.e., the second sub-pixel 2 is green sub-pixel; and the third sub-pixel3 emits red light, i.e., the third sub-pixel 3 is a red sub-pixel.

Based upon the same inventive idea, the embodiments of this disclosurefurther provides a display substrate, as illustrated in FIG. 1A to FIG.1I, a display area of the display substrate includes a first displaysub-area A1 and a second display sub-area A2, where a distributiondensity of pixels in the first display sub-area A1 is higher than adistribution density of pixels in the second display sub-area A2. Asillustrated in FIG. 8 , both the first display sub-area A1 and thesecond display sub-area A2 include multiple columns of sub-pixelsparallel to each other, and a column of sub pixels in the first displaysub-area A1 are aligned with a corresponding column of sub pixels insecond display sub-area A2; and a light-emitting area of at least a partof the multiple sub-pixels in the second display sub-area A2 is greaterthan a light-emitting area of sub-pixels, with a same light-emittingcolor as the part of the multiple sub-pixels, in the first displaysub-area A1.

In the display substrate according to the embodiment of this disclosure,the display area includes the first display sub-area A1 in which pixelsare distributed at a high density (e.g., a high resolution), and thesecond display sub-area A2 in which pixels are distributed at a lowdensity (e.g., a low resolution). Since the distribution density ofpixels in the second display sub-area A2 is lower, a camera, sensor,earpiece and other elements can be arranged in the second displaysub-display area, that is, the distribution density of the local pixelscan be lowered to thereby improve the transmittivity of a screen so asto improve a screen to panel ratio of the display substrate. Moreover,by increasing the light-emitting area of at least part of the sub-pixelsin the second display sub-area A2, dark strip on the interface betweenthe second display sub-area A2 and the first display sub-area A1 can beavoided; and by aligning a column of sub pixels in the first displaysub-area A1 with a corresponding column of sub pixels in the seconddisplay sub-area A2, the uniformity of light-emitting of the firstdisplay sub-area A1 and the second display sub-area A2 can be improved.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 5 , the second display sub-area A2includes first sub-pixels 1, second sub-pixels 2 and third sub-pixels 3;in the second display sub-area A2; and a center of a first sub-pixel 1,a center of a second sub-pixel 2 and a center of a third sub-pixel 3 areconnected to form an isosceles triangle, where the first sub-pixel 1,the second sub-pixel 2 and the third sub-pixel 3 are adjacent to eachother. That is, lines connecting the centers of the first sub-pixel 1,the second sub-pixel 2 and the third sub-pixel 3 constitute a triangle,thereby avoiding traverse bright and dark strips from occurring in thesecond display sub-area.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 10 , in the second display sub-areaA2, two first sub-pixels 1 and two third sub-pixels 3 adjacent to eachother form a rectangle, and a second sub-pixel 2 is arranged in a centerof the rectangle, so that the uniformity of the light emitting of thesecond display sub-area A2 can be improved.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 11 , the second sub-pixels 2 in thesecond display sub-area A2 are arranged in multiple rows, the secondsub-pixels 2 in two adjacent rows of second sub-pixels are staggered.The second sub-pixel 2 can be a green sub-pixel, since the human eyesare most sensitive to green, such arrangement of sub-pixels can improvethe uniformity of pixel distribution.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 7 , the second display sub-area A2includes multiple columns of sub-pixels extending along the columndirection; and in the columns direction, there is at least one sub-pixelcolumn of the first display sub-area A1 between at least two adjacentsub-pixel columns in the second display sub-area A2, thereby reducingthe pixel density and improving the transmittance.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 3 , the first display sub-area A1includes first sub-pixels 1, second sub-pixels 2 and third sub-pixels 3;and the first display sub-area A1 includes multiple columns of secondsub-pixels extending along the column direction, and a sub-pixel row atthe edge of the first display sub-area A1 is a second sub-pixel row.

Optionally in the display substrate according to the embodiment of thisdisclosure, the sub-pixels adjacent to the second sub-pixel column atthe edge of the first display sub-area A1 are first sub-pixels 1 andthird sub-pixels 3; and among the sub-pixels adjacent to the secondsub-pixel column, a part of the sub-pixels arranged in the first displaysub-area A1 have the same color, and the remaining part of thesub-pixels arranged in the second display sub-area A2 have the samecolor, so as to ensure the normal light emitting of the edge region.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 2 to FIG. 6 , in the first displaysub-area A1, a second sub-pixel 2 can form a triangle with an adjacentfirst sub-pixel 1 and an adjacent third sub-pixel 3, the adjacent firstsub-pixel 1 and the adjacent third sub-pixel 3 can arranged at one sideof a row where the second sub-pixel 2 is located, or the adjacent firstsub-pixel 1 and the adjacent third sub-pixel 3 can arranged at the otherside of the row where the second sub-pixel 2 is located, so that theresolution of the first display sub-area A1 can be improved.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 10 , in the second display sub-areaA2, the first sub-pixel 1 and the third sub-pixel 3 closest to a row ofsecond sub-pixels 2 are alternately arranged along the row direction,which can ensure uniform of the light emitting.

Optionally in the display substrate according to the embodiment of thisdisclosure, in the first display sub-area A1, first sub-pixels 1 in onesub-pixel row are aligned with third sub-pixels 3 in another sub-pixelrow adjacent to the one sub-pixel row, thereby ensuring an uniformlydistribution of pixels.

Optionally in the display substrate according to the embodiment of thisdisclosure, as illustrated in FIG. 7 , at least one sub-pixel in thesecond display sub-area A2 and at least one sub-pixel in the firstdisplay sub-area A1 with the same color as the at least one sub-pixel inthe second display sub-area A2 have effective light-emitting areas withdifferent shapes. That is, shapes of the effective light-emitting areaof sub-pixels in the first display sub-area A1 can be different fromshapes of the effective light-emitting area of sub-pixels, with a samecolor as the sub-pixels in the first display sub-area A1, in the seconddisplay sub-area A2, thereby reducing diffraction.

Optionally in the display substrate according to the embodiment of thisdisclosure, the first sub-pixel 1 emits blue light, i.e., the firstsub-pixel 1 is blue sub-pixel; the second sub-pixel 2 emits green light,i.e., the second sub-pixel 2 is green sub-pixel; and the third sub-pixel3 emits red light, i.e., the third sub-pixel 3 is a red sub-pixel.

Based upon the same inventive idea, an embodiment of this disclosurefurther provides a display device, as illustrated in FIG. 1A to FIG. 1I,the display device including a display area including a first displaysub-area A1 and a second display sub-area A2 provided with a camera; thefirst display sub-area A1 includes a plurality of groups of pixels 100,each group of pixels 100 includes a first pixel element 10 and a secondpixel element 20, each group of pixels 100 includes a first sub-pixel 1,two second sub-pixels 2 and a third sub-pixel 3 adjacent to each otherand arranged on a row direction; the two second sub-pixels 2 areadjacent to each other and arranged in a column direction, the pluralityof groups of pixels 100 are arranged in the row direction to form aplurality of rows of pixels, and the plurality of rows of pixels arearranged along a column direction;

the second display sub-area A2 includes a plurality of third pixelelements 30, each third pixel element 30 includes a first sub-pixel 1, asecond sub-pixel 2 and a third sub-pixel 3 arranged adjacent to eachother, the plurality of third pixel elements 30 are arranged in the rowdirection to form a plurality of rows of pixel, the plurality of rows ofpixels are arranged along the column direction, and lines connectingcenters of the first sub-pixel 1, the second sub-pixel 2 and the thirdsub-pixel 3 in each third pixel elements form a triangle; and, adistribution density of pixels in the first display sub-area A1 isgreater than a distribution density of pixels in the second displaysub-area A2.

In the display device according to the embodiment of this disclosure,the display area includes the first display sub-area A1 in which pixelsare distributed at a high density (e.g., a high resolution), and thesecond display sub-area A2 in which pixels are distributed at a lowdensity (e.g., a low resolution). Since the distribution density ofpixels in the second display sub-area A2 is lower, a camera, sensor,earpiece and other elements can be arranged in the second displaysub-display area, that is, the distribution density of the local pixelscan be lowered to thereby improve the transmittivity of a screen so asto improve a screen to panel ratio of the display substrate in thedisplay device.

It should be noted that the row direction is perpendicular to the columndirection, and the meaning of “perpendicular” in this disclosure is thatthe included angle between the row direction and the column direction is80° to 100°.

Optionally in the display device according to the embodiments of thisdisclosure, as illustrated in FIG. 9 , a shape of at least one sub-pixelin the first display sub-area A1 is different from a shape of asub-pixel in the second display sub-area A2 that emitting light with asame color as the at least one sub-pixel, so that diffraction problemscan be avoided in the second display sub-area A2.

Optionally in the display device according to the embodiments of thisdisclosure, as illustrated in FIG. 2 to FIG. 6 , shapes of sub-pixels inthe second display sub-area A2 are rectangular. Since the rectangle is aregular shape, it is generally easy to form from the perspective of aprocess.

Optionally in the display device according to the embodiments of thisdisclosure, as illustrated in FIG. 7 to FIG. 13 , a quantity ofsub-pixels in one group of pixels 100 of the first display sub-area A2is greater than a quantity of sub-pixels in one third pixel element 30of the second display sub-area A2.

Optionally in the display device according to the embodiments of thisdisclosure, as illustrated in FIG. 7 to FIG. 13 , a quantity of thesecond sub-pixel 2 in the one group of pixels 100 of the first displaysub-area A1 is twice a quantity of the second sub-pixel 2 in the onethird pixel element 30 of the second display sub-area A2.

Optionally in the display device according to the embodiments of thisdisclosure, as illustrated in FIG. 7 to FIG. 13 , in the second displaysub-area A2, a length of the first sub-pixel 1 in the column directionand a length of the third sub-pixel 3 in the column direction are bothgreater than a length of the second sub-pixel 2 in the column direction.

Optionally in the display device according to the embodiments of thisdisclosure, as illustrated in FIG. 7 to FIG. 13 , in the second displaysub-area A2, an area of the second sub-pixel 2 is less than an area ofthe third sub-pixel 3. As such, the light-emitting efficiency of thesecond sub-pixel 2 can be improved.

Optionally in the display device according to the embodiments of thisdisclosure, as illustrated in FIG. 7 , a light-emitting area of asub-pixel in the second display sub-area A2 is greater than alight-emitting area of a sub-pixel with a same color in the firstdisplay sub-area A1. By increasing the light-emitting area of thesub-pixels in the second display sub-area A2, dark strip on theinterface between the second display sub-area A2 and the first displaysub-area A1 can be avoided.

Optionally in the display device according to the embodiments of thisdisclosure, as illustrated in FIG. 7 , in the second display sub-areaA2, a length of the first sub-pixel 1 in the column direction is greaterthan twice a length of the second sub-pixel 2 in the column direction.

Optionally in the display device according to the embodiments of thisdisclosure, as illustrated in FIGS. 7-11 and 13 , in the second displaysub-area A2, first sub-pixels 1, second sub-pixels 2 and thirdsub-pixels 3 in a plurality of third pixel elements 30 arranged on asame column are respectively arranged on a same straight line extendingalong the column direction.

Optionally in the display device according to the embodiments of thisdisclosure, as illustrated in FIGS. 3, 7-11 and 13 , in the seconddisplay sub-area A2, sub-pixels in different third pixel elements havesame relative positions.

Optionally in the display device according to the embodiments of thisdisclosure, as illustrated in FIG. 4 to FIG. 6 , at a portion of an edgeof the second display sub-area A2 near to the first display sub-area A1,the first sub-pixel 1 and the third sub-pixel 3 are closet to the firstdisplay sub-area.

Optionally in the display device according to the embodiments of thisdisclosure, as illustrated in FIG. 6 , the first display sub-area A1includes a plurality of columns of second sub-pixels 1, and a portion ofan edge of the first display sub-area A2 close to the second displaysub-area A2 is provided the column of second sub-pixels 2, to ensurenormal light emission in the edge area between the first display subarea A1 and the second display sub area A2.

Optionally in the display device according to the embodiments of thisdisclosure, in the second display sub-area A2, a size of the thirdsub-pixel 3 in the row direction is same as a size of the secondsub-pixel 2 in the row direction.

Optionally in the display device according to the embodiments of thisdisclosure, as illustrated in FIGS. 6, 11-13 , in the second displaysub-area A2, third pixel elements 30 in adjacent rows are arranged in astaggered arrangement.

Optionally in the display device according to the embodiments of thisdisclosure, as illustrated in FIGS. 2-4, 8, 11-13 , in one third pixelelement 30 of the second display sub-area A2, the line connecting thecenters of the second sub-pixel 2 and the third sub-pixel 3 is parallelto the row direction.

Optionally in the display device according to the embodiments of thisdisclosure, in the first display sub-area A1, the plurality of groups ofpixels 100 are arranged in the column direction to form a plurality ofcolumns of pixels, the plurality of columns of pixels are arranged alongthe row direction, and two adjacent columns of the pixels are arrangedin a staggered arrangement, and two adjacent rows of the pixels arearranged in a staggered arrangement.

Optionally in the display device according to the embodiments of thisdisclosure, wherein the first sub-pixel 1 emits red light, the secondsub-pixel 2 emits green light, and the third sub-pixel 3 emits bluelight.

Based upon the same inventive idea, an embodiment of this disclosurefurther provides a method for driving the display substrate according toany one of an embodiments above of this disclosure, and as illustratedin FIG. 14 , the method includes the following steps:

the step S1301 is to receive raw image data;

the step S1302 is, for each sub-pixel in the first display sub-area, todetermine a target grayscale of the sub-pixel according to an initialgrayscale of a sub-pixel in the raw image data, corresponding to thesub-pixel; and for each sub-pixel in the second display sub-area, todetermine a target grayscale of the sub-pixel according to alight-emitting area of the sub-pixel, the distribution density of pixelsin the second display sub-area, and an initial grayscale of a sub-pixelin the raw image data, corresponding to an area including the sub-pixel;and

the step S1303 is to drive the respective sub-pixels in the displaysubstrate to display at their target grayscales.

For a sub-pixel in the first display sub-area, when a physical pixel inthe first display sub-area corresponds to a pixel in the image data, atarget grayscale of the sub-pixel is generally an initial grayscalethereof; and when the number of physical pixels in the first displaysub-area is less than the number of pixels in the image data, there is aborrowing relationship between displaying sub-pixels, so a sub-pixel maycorrespond to two or more pixels in the image data, and thus the gargetgrayscale of the sub-pixel shall be calculated according to the initialgrayscale of the sub-pixel in the raw image data, corresponding thereto.

For each sub-pixel in the second display sub-area, there is a lowresolution, and in order to display an image, a physical pixelcorresponds to a pixel in the image data, and a target grayscale of thesub-pixel is generally an initial grayscale thereof. However there maybe such a problem there is a low resolution of the second displaysub-area, and if the image is displayed directly at the initialgrayscale, then there will be such a large difference in brightnessbetween the second display sub-area and the first display sub-area thatthere may be an apparent dark strip at the interface between the seconddisplay sub-area and the first display sub-area. In order to addressthis problem, a driver according to this embodiment of this disclosureadjusts the grayscale of the sub-pixel in the second display sub-areaaccording to a light-emitting area of the sub-pixel, and thedistribution density of pixels in the second display sub-area. Forexample, if there is a larger light-emitting area of the sub-pixel,there is high overall brightness in the second display sub-area, andthere are a larger number of sub-pixels distributed in the seconddisplay sub-area, then there will be high overall brightness in thesecond display sub-area.

It shall be noted that a physical pixel generally includes three RGBsub-pixels.

In a particular implementation, when the pixels are arranged in a pantile pattern in the first display sub-area, both the first sub-pixelsand the third sub-pixels are borrowed for displaying an image, so afirst sub-pixel generally corresponds to two pixels in the image data, athird sub-pixel corresponds to two pixels in the image data, and nosecond sub-pixel is borrowed, and thus a second sub-pixel generallycorresponds to a pixel in the image data.

Accordingly optionally in the method according to an embodiment of thisdisclosure, determining for each sub-pixel in the first display sub-areathe target grayscale of the sub-pixel particularly can include:

determining a target grayscale X corresponding to a first sub-pixel inthe equation of

${X = \left( \frac{x_{1}^{Gamma} + x_{2}^{Gamma}}{2} \right)^{\frac{1}{Gamma}}},$

where Gamma represents a gamma value of the display substrate, and x₁and x₂ represent initial grayscales of two first sub-pixels in the rawimage data, which correspond to the first sub-pixel respectively;

determining a target grayscale Y of a second sub-pixel as an initialgrayscale y of a second sub-pixel in the raw image data, correspondingto the second sub-pixel; and

determining a target grayscale Z corresponding to a third sub-pixel inthe equation of

${Z = \left( \frac{z_{1}^{Gamma} + z_{2}^{Gamma}}{2} \right)^{\frac{1}{Gamma}}},$

where z₂ represent initial grayscales of two third sub-pixels in the rawimage data, which correspond to the third sub-pixel respectively.

In a particular implementation, in order to alleviate a dark strip atthe interface between the second display sub-area and the first displaysub-area, brightness in the second display sub-area can be adjusted asappropriate, where the brightness is in proportion to a light-emittingarea and the distribution density of pixels.

Accordingly optionally in the method according to an embodiment of thisdisclosure, determining for each sub-pixel in the second displaysub-area the target grayscale of the sub-pixel particularly can include:

determining the target grayscale X corresponding to the sub-pixel in theequation of

${X = {k*s*{\rho\left( \frac{x_{1}^{Gamma} + x_{2}^{Gamma} + \ldots + x_{n}^{Gamma}}{n} \right)}^{\frac{1}{Gamma}}}},$

where n is any integer ranging from 1 to N, N is the number ofsub-pixels in the raw image data, which correspond to the sub-pixel,Gamma represents a gamma value of the display substrate, s representsthe ratio of a light-emitting area of a sub-pixel in the first displaysub-area to a light-emitting area of a sub-pixel in the second displaysub-area, ρ represents the ratio of the distribution density of pixelsin the first display sub-area to the distribution density of pixels inthe second display sub-area, k is an error adjustment coefficient, andx_(n) is an initial grayscale of the n-th sub-pixel in the raw imagedata, corresponding to the sub-pixel.

In a particular implementation, the error adjustment coefficient k canbe adjusted according to a real display effect of the display substrate,although an embodiment of this disclosure will not be limited thereto.

In a particular implementation, if there are m third pixel elements in aunit of area in the second display sub-area, and there are j pixels inthe image data in the corresponding area, then there will be j/m pixelsin image data corresponding to a third pixel element, that is, N=j/m. Atarget grayscale of a sub-pixel can be determined according to any oneor more of N sub-pixels corresponding thereto. For example, with N=4, atarget grayscale of a sub-pixel can be determined according to initialgrayscales of any one or more of four sub-pixels in image datacorresponding thereto. For example, if it is determined according to aninitial grayscale of one of the sub-pixels, then X=k*s*ρ*x_(i), where x₁represents an initial grayscale of any one of the four sub-pixels. Forexample, if it is determined according to initial grayscales of two ofthe sub-pixels, then

${X = {k*s*{\rho\left( \frac{x_{1}^{Gamma} + x_{2}^{Gamma}}{2} \right)}^{\frac{1}{Gamma}}}},$

where x₁ and x₂ represent initial grayscales of any two of the foursub-pixels. For example, if it is determined according to initialgrayscales of three of the sub-pixels, then

${X = {k*s*{\rho\left( \frac{x_{1}^{Gamma} + x_{2}^{Gamma} + x_{3}^{Gamma}}{3} \right)}^{\frac{1}{Gamma}}}},$

where x₁, x₂, and x₃ represent initial grayscales of any three of thefour sub-pixels. For example, if it is determined according to initialgrayscales of the sub-pixels, then

${X = {k*s*{\rho\left( \frac{x_{1}^{Gamma} + x_{2}^{Gamma} + x_{3}^{Gamma} + x_{4}^{Gamma}}{4} \right)}^{\frac{1}{Gamma}}}},$

where x₁, x₂, x₃, and x₄ represent initial grayscales of the foursub-pixels.

Based upon the same inventive idea, an embodiment of this disclosurefurther provides a display device including the display substrateaccording to any one of the embodiments above of this disclosure. Thedisplay device can be a mobile phone, a tablet computer, a TV set, amonitor, a notebook computer, a digital photo frame, a navigator, or anyother product or component with a display function. Reference can bemade to an embodiment of the display substrate above for animplementation of the display device, and a repeated description thereofwill be omitted here.

Optionally the display device according to an embodiment of thisdisclosure further includes a driver configured to drive the displaysubstrate, where the driver of the display substrate can be anIntegrated Circuit (IC), an external Central Processing Unit (CPU), amicro processor, etc., and is configured:

to receive raw image data;

for each sub-pixel in the first display sub-area, to determine a targetgrayscale of the sub-pixel according to an initial grayscale of asub-pixel in the raw image data, corresponding to the sub-pixel;

for each sub-pixel in the second display sub-area, to determine a targetgrayscale of the sub-pixel according to a light-emitting area of thesub-pixel, the distribution density of pixels in the second displaysub-area, and an initial grayscale of a sub-pixel in the raw image data,corresponding to an area including the sub-pixel; and

to drive the respective sub-pixels in the display substrate to displayat their target grayscales.

Optionally in the display device according to an embodiment of thisdisclosure, the driver is configured to determine for each sub-pixel inthe first display sub-area the target grayscale of the sub-pixel by:

determining a target grayscale X corresponding to a first sub-pixel inthe first display sub-area in the equation of

${X = \left( \frac{x_{1}^{Gamma} + x_{2}^{Gamma}}{2} \right)^{\frac{1}{Gamma}}},$

where Gamma represents a gamma value of the display substrate, which isgenerally 2.2, and x₁ and x₂ represent initial grayscales of two firstsub-pixels in the raw image data, which correspond to the firstsub-pixel respectively;

determining a target grayscale Y of a second sub-pixel in the firstdisplay sub-area as an initial grayscale y of a second sub-pixel in theraw image data, corresponding to the second sub-pixel; and

determining a target grayscale Z corresponding to a third sub-pixel inthe first display sub-area in the equation of

${Z = \left( \frac{z_{1}^{Gamma} + z_{2}^{Gamma}}{2} \right)^{\frac{1}{Gamma}}},$

where z₁ and z₂ represent initial grayscales of two third sub-pixels inthe raw image data, which correspond to the third sub-pixelrespectively.

In a particular implementation, in order to alleviate a dark strip atthe interface between the second display sub-area and the first displaysub-area, brightness in the second display sub-area can be adjusted asappropriate, where the brightness is in proportion to a light-emittingarea and the distribution density of pixels.

Accordingly optionally in the display device according to an embodimentof this disclosure, the driver is configured to determine for eachsub-pixel in the second display sub-area the target grayscale of thesub-pixel by:

determining the target grayscale X corresponding to the sub-pixel in theequation of

${X = {k*s*{\rho\left( \frac{x_{1}^{Gamma} + x_{2}^{Gamma} + \ldots + x_{n}^{Gamma}}{n} \right)}^{\frac{1}{Gamma}}}},$

where n is any integer ranging from 1 to N, N is the number ofsub-pixels in the raw image data, which correspond to the sub-pixel,Gamma represents a gamma value of the display substrate, s representsthe ratio of a light-emitting area of a sub-pixel in the first displaysub-area to a light-emitting area of a sub-pixel in the second displaysub-area, ρ represents the ratio of the distribution density of pixelsin the first display sub-area to the distribution density of pixels inthe second display sub-area, k is an error adjustment coefficient, andx_(n) is an initial grayscale of the n-th sub-pixel in the raw imagedata, corresponding to the sub-pixel.

In a particular implementation, the error adjustment coefficient k canbe adjusted according to a real display effect of the display substrate,although an embodiment of this disclosure will not be limited thereto.

A reference can be made to the implementation of the driver in thedisplay device above for details of the method according to anembodiment of this disclosure.

In a particular implementation, in the display device according to anembodiment of this disclosure, the driver integrates all the algorithmsfor calculating the target grayscales of the sub-pixels in therespective sub-areas into an IC. In order to display an image, thedriver determines the target grayscales corresponding to the respectivesub-pixels according to the received image data.

Furthermore before the display substrates displays at the targetgrayscales, in order to improve the uniformity of brightness, generallya Demura algorithm shall also be performed. A particular Demuraalgorithm is known in the art, so a repeated description thereof will beomitted here.

Based upon the same inventive idea, an embodiment of this disclosurefurther provides a fine metal mask for fabricating the display substrateaccording to any one of an embodiments of this disclosure, where thefine metal mask includes a plurality of opening areas corresponding inshape and position to the first sub-pixels, the second sub-pixels, orthe third sub-pixels.

In a particular implementation, each sub-pixel generally includes ananode layer, a light-emitting layer, and a cathode layer, where thelight-emitting layer is generally vapor-plated using the fine metal maskabove. Taking the display substrate as illustrated in FIG. 12 as anexample, the fine metal mask for forming the first sub-pixels includesopening areas 01 corresponding in shape and position to thelight-emitting layers of the first substrate 1 in the display substrateas illustrated in FIG. 16 . The area of an opening area 01 is generallylarger than an area of a corresponding light-emitting area due to alimiting process factor. Principles of fine metal mask for forming thesecond sub-pixels, and the fine metal mask for forming the thirdsub-pixels are similar to the principle of the fine metal mask forforming the first sub-pixels, so a repeated description thereof will beomitted here.

In the display substrate, the method for driving the same, the displaydevice, and the fine metal mask above according to the embodiments ofthis disclosure, the display area includes the first display sub-areawith a high distribution density of pixels (i.e., a high resolution),and the second display sub-area with a low distribution density ofpixels (i.e., a low resolution), and since the distribution density ofpixels in the second display sub-area is low, a camera and anotherelement can be arranged in the second display sub-area, that is, thedistribution density of the local pixels can be lowered to therebyimprove the transmittivity of a screen so as to improve a screen topanel ratio of the display substrate. Furthermore in order to drive thedisplay substrate, the grayscale of a sub-pixel in the second displaysub-area can be adjusted according to the light-emitting area of thesub-pixel, and the distribution density of pixels, in the second displaysub-area to thereby compensate for a significant difference inbrightness between the second display sub-area and the first displaysub-area due to the difference between the distribution density ofpixels in the first display sub-area, and the distribution density ofpixels in the second display sub-area so as to alleviate a dark stripfrom occurring at the interface between the first display sub-area andthe second display sub-area, so that the image can be displayedthroughout the screen.

Evidently those skilled in the art can make various modifications andvariations to the invention without departing from the spirit and scopeof the invention. Thus the invention is also intended to encompass thesemodifications and variations thereto so long as the modifications andvariations come into the scope of the claims appended to the inventionand their equivalents.

1. A display device, comprising a display area; wherein the display areacomprises: a first display sub-area; and a second display sub-area,provided with a camera, wherein: the first display sub-area comprises aplurality of groups of pixels, each group of pixels comprises a firstpixel element and a second pixel element, each group of pixels comprisesa first sub-pixel, two second sub-pixels and a third sub-pixel adjacentto each other and arranged on a row direction; the two second sub-pixelsare adjacent to each other and arranged in a column direction, theplurality of groups of pixels are arranged in the row direction to forma plurality of rows of pixels, and the plurality of rows of pixels arearranged along a column direction; the second display sub-area comprisesa plurality of third pixel elements, each third pixel element comprisesa first sub-pixel, a second sub-pixel and a third sub-pixel arrangedadjacent to each other, the plurality of third pixel elements arearranged in the row direction to form a plurality of rows of pixel, theplurality of rows of pixels are arranged along the column direction, andlines connecting centers of the first sub-pixel, the second sub-pixeland the third sub-pixel in each third pixel elements form a triangle;and, a distribution density of pixels in the first display sub-area isgreater than a distribution density of pixels in the second displaysub-area.
 2. The display device according to claim 1, wherein a shape ofat least one sub-pixel in the first display sub-area is different from ashape of a sub-pixel in the second display sub-area that emitting lightwith a same color as the at least one sub-pixel.
 3. The display deviceaccording to claim 1, wherein shapes of sub-pixels in the second displaysub-area are rectangular.
 4. The display device according to claim 1,wherein a quantity of sub-pixels in one group of pixels of the firstdisplay sub-area is greater than a quantity of sub-pixels in one thirdpixel element of the second display sub-area.
 5. The display deviceaccording to claim 4, wherein a quantity of the second sub-pixel in theone group of pixels of the first display sub-area is twice a quantity ofthe second sub-pixel in the one third pixel element of the seconddisplay sub-area.
 6. The display device according to claim 1, wherein inthe second display sub-area, a length of the first sub-pixel in thecolumn direction and a length of the third sub-pixel in the columndirection are both greater than a length of the second sub-pixel in thecolumn direction.
 7. The display device according to claim 1, wherein inthe second display sub-area, an area of the second sub-pixel is lessthan an area of the third sub-pixel.
 8. The display device according toclaim 2, wherein a light-emitting area of a sub-pixel in the seconddisplay sub-area is greater than a light-emitting area of a sub-pixelwith a same color in the first display sub-area.
 9. The display deviceaccording to claim 6, wherein in the second display sub-area, a lengthof the first sub-pixel in the column direction is greater than twice alength of the second sub-pixel in the column direction.
 10. The displaydevice according to claim 1, wherein in the second display sub-area,first sub-pixels, second sub-pixels and third sub-pixels in a pluralityof third pixel elements arranged on a same column are respectivelyarranged on a same straight line extending along the column direction.11. The display device according to claim 1, wherein in the seconddisplay sub-area, sub-pixels in different third pixel elements have samerelative positions.
 12. The display device according to claim 1, whereinat a portion of an edge of the second display sub-area near to the firstdisplay sub-area, the first sub-pixel and the third sub-pixel are closetto the first display sub-area.
 13. The display device according to claim12, wherein the first display sub-area comprises a plurality of columnsof second sub-pixels, and a portion of an edge of the first displaysub-area close to the second display sub-area is provided the column ofsecond sub-pixels.
 14. The display device according to claim 1, whereinin the second display sub-area, a size of the third sub-pixel in the rowdirection is same as a size of the second sub-pixel in the rowdirection.
 15. The display device according to claim 1, wherein in thesecond display sub-area, third pixel elements in adjacent rows arearranged in a staggered arrangement.
 16. The display device according toclaim 1, wherein in one third pixel element of the second displaysub-area, the line connecting the centers of the second sub-pixel andthe third sub-pixel is parallel to the row direction.
 17. The displaydevice according to claim 1, wherein in the first display sub-area, theplurality of groups of pixels are arranged in the column direction toform a plurality of columns of pixels, the plurality of columns ofpixels are arranged along the row direction, and two adjacent columns ofthe pixels are arranged in a staggered arrangement, and two adjacentrows of the pixels are arranged in a staggered arrangement.
 18. Thedisplay device according to claim 1, wherein the first sub-pixel emitsred light, the second sub-pixel emits green light, and the thirdsub-pixel emits blue light.